This standard specifies the categories, requirements, test methods, inspection rules, signs, labels, instructions for use, packaging, transportation and storage of flexographic water-based inks. This standard applies to flexographic water-based inks used on flexographic printing presses. This water-based ink is suitable for a variety of substrates such as kraft paper, corrugated paper, cardboard, coated paper and PE synthetic paper, and has good printing suitability for coated waterproof paper. QB/T 2825-2006 Flexographic water-based inks QB/T2825-2006 Standard download decompression password: www.bzxz.net
This standard specifies the categories, requirements, test methods, inspection rules, signs, labels, instructions for use, packaging, transportation and storage of flexographic water-based inks. This standard applies to flexographic water-based inks used on flexographic printing presses. This water-based ink is suitable for a variety of substrates such as kraft paper, corrugated paper, cardboard, coated paper and PE synthetic paper, and has good printing suitability for coated waterproof paper.

ICS 87.080
Classification number: A17
Reservation number: 18961-2006
Light Industry Standard of the People's Republic of China
QB/T2825—2006
Waterbased flexo ink
Published on September 14, 2006
Implementation by the National Development and Reform Commission of the People's Republic of China on May 1, 2007
This standard is proposed by the China Light Industry Federation. Foreword
This standard is under the jurisdiction of the National Technical Committee for Ink Standardization. QB/T2825—2006
The drafting units of this standard are: Hanghua Ink Chemical Co., Ltd., National Printing and Decoration Products Quality Supervision and Inspection Center, Tianjin Dongyang Youwang Co., Ltd., and Shanghai Ink Silian Chemical Co., Ltd. The main drafters of this standard are: Huang Ronghai, Zhang Liming, Shi Jing, and Chen Yi. This standard is published for the first time.
1 Scope
Flexo water-based ink
QB/T2825-2006
This standard specifies the classification, requirements, test methods, inspection rules, signs, labels, instructions for use, packaging, transportation and storage of flexo water-based ink.
This standard applies to flexo water-based ink used on flexo printing presses. The water-based ink is suitable for a variety of substrates such as kraft paper, corrugated paper, cardboard, coated paper and PE synthetic paper, and has good printing suitability for coated waterproof paper. 2 Normative references
The clauses in the following documents become clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version shall apply to this standard. GB250 Grey scale for evaluating color change
GB3186 Sampling method for coating products
GB6675 National technical specification for toy safety
General Administration of Quality Supervision, Inspection and Quarantine Order No. 75 Metrology supervision regulations for quantitatively packaged goods 3 Requirements
The technical indicators of this product shall comply with the requirements of Table 1 and Table 2. 3.1
Table 1 Technical indicators
Color category
Zirconium (Pb)
Mercury (Hg)
Arsenic (As)
Viscosity/s
Surface dryness/min
Oil-free
Table 2 Maximum limits of migratable elements
Chromium (Cr)
Radium (Cd)
Antimony (Sb)bzxz.net
Color strength/（%)
95~105
Flowability/（%)
Unit is mg/kg
Barium (Ba)
Selenium (Se))
3.2 The net content error of a single piece of quantitatively packaged commodity shall comply with the provisions of Appendix 3 to Order No. 75 of the General Administration of Quality Supervision, Inspection and Quarantine. 1
QB/T 2825—2006
4 Test method
4.1 Color test
4. 1.1 Test principle
Brush the sample ink with a standard 140-line flexographic printing tester and compare it with the printed sample of the standard ink. Under the standard light source, use the gray sample card for evaluating color change (see GB250) to evaluate the color level. 4. 1. 2 Tools and materials
a) 120g kraft cardboard;
b) rubber pad;
c) 140-line flexographic printing tester:
d) D6s. standard light source;
e) gray sample for evaluating color change (see GB250). 4.1.3 Test steps
Put the kraft paper on the rubber pad and fix the upper end: lift the sample oil and stir it evenly, and print it with a flexographic printing test machine. 4.1.4 Test results
Use the gray sample card for color change assessment (EGiB250) under the standard source (Da4) to assess the color level: 4.2 Viscosity test
4.2.1 Test principle
-The time it takes for a certain amount of ink to flow out of a hole of a specified diameter at a certain temperature is the viscosity of the ink. 4.2.2 Engineering and Materials
a) Zahn 4# viscosity cup:
b) Mercury thermometer: temperature range 0℃～50℃, graduation value 0.1℃:c) Stopwatch: graduation value 0.2s:
d) Glass rod: diameter 7mm, length 250mm4.2.3 Inspection steps
a) Clean the inner wall and nozzle of the viscosity cup, hold the viscosity cup horizontally, plug the nozzle hole with your finger, and pour the sample that has been stirred for about 20 times and adjusted to (25±I)℃ into the viscosity cup until it is flush with the edge of the viscosity cup, and scrape off the bubbles with a glass rod:b) Release your finger and start the stopwatch at the same time. When the sample flow is interrupted and the first drop appears, stop the timing. At this time, the time indicated by the stopwatch is the viscosity of the ink.
4.2. 4 Test results
The test should be carried out twice in parallel, and the deviation of the measured values ​​should not exceed 3s, and the average value should be taken. 4. 3PH test
4.3.1 Test principle
Use a pH meter to test the oil,
4.3.2 Technology and materials
a) pH meter (minimum resolution 0.02);
b) standard buffer solution;
o) distilled water;
d) filter paper.
4.3.3 Test steps
Use a standard buffer solution to calibrate the pH meter, wash the electrode head with distilled water, dry the filter paper, and then measure the pH of the sample, and conduct parallel tests on two samples.
4.3.4 Test results
QB/T 2825-2006
If the difference in pH between two parallel samples is greater than 0.30 units, the test should be repeated and the average of the two test values ​​should be calculated. 4.4 Surface dryness test
4.4.1 Test principle
For a certain period of time, let the scraped sample of ink on the leather paper rub against 80g offset paper under a certain pressure to check the degree of staining of the offset paper due to friction.
4.4.2 Tools and materials
a) One 50g fifth-grade base weight:
b) Kraft paper and 80g offset paper:
c) Ink knife and 6# wire rod:
d) Stopwatch.
4. 4. 3 Inspection steps
a) Stir the ink evenly, take a certain amount of ink with a mixer knife and drop it on the printed leather paper, use a 6# wire rod to measure and time; b) At the same time, place the scraped sample flat on a smooth glass plate (ink sample facing up). Cover it with 80g offset paper, and then press the code on the paper strip near the end of the scraped sample:
c) Grasp the other end of the empty offset paper strip and move it horizontally along the scraped sample within 2 minutes, so that the offset paper rubs against the scraped sample under the pressure of the magnetic code. 4.4.4 Inspection results
Check whether the paper strip is stained, and it is qualified if it is not stained. 4.5 Coloring strength test
4.5.1 Inspection principle
Quantitative standard white ink dilutes the test sample and the standard sample respectively, and compares the coloring strength of the diluted ink scraped sample, expressed in percentage. 4.5.2 Tools and Materials
a) Scraping paper: (80-100)g offset paper, printed with a 2cm wide black horizontal line; b) Standard self-ink and standard black ink;
c) Weighing bottle: capacity 50ml
d) Balance: sensitivity 0.01g;
e) Scraper.
4.5.3 Test conditions
The test should be carried out under the Ds standard lighting. 4.5.4 Test steps
a) On the balance, weigh 1g of sample ink and 10g of standard white ink using a weighing bottle. Use the same method and the same proportion to weigh the standard sample ink and standard white, and mix them thoroughly;
b) Take a small amount of the diluted and adjusted ink, place it on the upper left of the scraping paper, and take a small amount of the sample, place it on the upper right of the scraping paper, the two are adjacent but not connected, use a scraper to scrape from top to bottom to a length of 80mm~100mm, reduce the inner angle of the scraper, and apply the ink into a thicker ink layer:
c) Observe whether the surface color and color of the sample and the standard sample are consistent. If not, change the amount of white ink used in the sample until the diluted sample and the standard sample are consistent. Calculate according to formula (1) to obtain the percentage of the tinting power of the sample. 4.5.5 Test results
The calculation of tinting strength is carried out according to formula (1): S=
QB/T28252006
Wu Zhong:
S~—tinting strength percentage (with standard sample as 100%): C—amount of white ink used to dilute the standard sample, g
D—amount of white ink used to dilute the test sample.
Note: When testing the tinting strength of white ink, the standard sample and the test sample are used to replace the white ink used above, but the white ink is changed to 10g and the standard black ink is weighed to 1g. The operation method is as above, and the calculation formula is the same as formula (1), but C is the amount of white ink used for the test sample, and D is the amount of white ink used for the standard sample. 4.6 Fluidity test
4.6.1 Test principle
The fluidity of the ink is compared by comparing the amount of quantitative ink flowing out of the leak hole at the bottom of the specified container with the total amount of ink. 4.6.2 Tools and Materials
a) Zahn 4# viscosity cup:
b) 100mL measuring cup.
4.6.3 Test Steps
a) Wipe the inner wall and the nozzle of the viscosity cup clean, hold the viscosity cup horizontally, block the nozzle with your finger, pour the sample that has been stirred for about 20 times and adjusted to (25±1)℃ into the viscosity cup until it is flush with the edge of the viscosity cup, and scrape off the bubbles with a glass sample: b) Remove the finger and let the sample flow into a 100mL clean and dry measuring cup. When the sample flow is interrupted and the first drop appears, remove the 4# viscosity cup and read the volume of ink in the measuring cup (mL). The ratio of the volume to the capacity of the 4# viscosity cup is the fluidity in %. 4.6.4 Test Results
The fluidity is qualified if it is not less than 95%.
4.6.5 Precautions
The ink should be fully stirred before testing.
4.7 The content of mobile elements shall be tested according to Appendix C of GB6675. 4.8 Test conditions
The test shall be carried out at a temperature of (25±1)℃ and a humidity of (65±5)%. 5 Test rules
5.1 Factory inspection
Factory inspection items: color, viscosity, pH. 5.2 Type inspection
Type inspection is all items specified in the requirements of this standard. Type inspection shall be carried out when the product has any of the following conditions. a) When there are major changes in raw materials, formula or production process; b) When resuming production after a long period of suspension;
c) When the superior quality supervision department conducts random inspections:
d) During normal production, the type inspection cycle is six months. 5.3 The unit product of a single machine or unit that is put into operation at one time is a batch. Random sampling of each batch of products shall be carried out in accordance with GB3186. 5.4 The receiving unit has the right to inspect the product according to the provisions of the standard. If the product quality is found to be inconsistent with the technical indicators of this standard, the supply and demand parties shall jointly negotiate and determine. If it is indeed unusable, the receiving unit has the right to resell. 5.5 The supply and demand parties shall check and verify the packaging and quantity of the product. If the packaging is leaking, the quantity is inconsistent, etc., the relevant departments shall be notified in time.
5.6 When the supply and demand parties have a dispute over product quality, the national product quality supervision and inspection agency shall perform arbitration inspection. 6 Marks, labels, instructions for use
QB/T2825-2006
6.1 The packaging shall be affixed with a trademark, indicating the manufacturer's name, address, product name, model, net weight, batch number, production date, standard number adopted, and inspection content.
6.2 When the user requires, the product manual or product safety instructions (MSDS) should also be attached. 7
Packaging, transportation, storage
7.1 This product is packaged in iron barrels or plastic barrels with plastic liners. 7.2 The product can be transported by vehicles, ships, airplanes and other means of transportation under the packaging requirements of 7.1. 7.3 During transportation and handling, the product should not be thrown, dropped or collided to prevent damage to the packaging. 7.4 The product should not be stored in the open air, but can be stored in a warehouse at -5℃ ~ 40℃. 7.3 The product has an effective storage period of one year from the date of production under the storage conditions of 7.4.
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